DOIBoost¶

DOIBoost: Crossref, Unpaywall, Microsoft Academic Graph, ORCID¶

The idea behind DOIBoost and its origin can be found in the paper (and related resources) at:

• La Bruzzo S., Manghi P., Mannocci A. (2019) OpenAIRE's DOIBoost - Boosting CrossRef for Research. In: Manghi P., Candela L., Silvello G. (eds) Digital Libraries: Supporting Open Science. IRCDL 2019. Communications in Computer and Information Science, vol 988. Springer, doi:10.1007/978-3-030-11226-4_11 . Open Access version available at: https://doi.org/10.5281/zenodo.1441071

In short, the goal is to enrich the records available on Crossref with what's available on Unpaywall, Microsoft Academic Graph, ORCID intersecting all those datasets by DOI.

Inputs¶

• Crossref: dump available to Crossref subscribers via MetadataPlus service, updated once a month.
• Micorsoft Academic Graph: downloaded version on 2021-02-15. We plan to take a latest version on Dec 2021 before MAG will be retired.
• ORCID: baseline dump obtained in XX/XX/XXXX from URL, regularly updated every week from the ORCID API available at URL
• Unpaywall: public database snapshot downloaded in March 2021. Unpaywall updates it twice a year (https://unpaywall.org/products/snapshot)

The generation of DOIBoost consists in the following phases:

1 Filter Crossref records that¶

• have blank title
• have one of the following publishers: "Test accounts", "CrossRef Test Account"
• have no authors with valid names, where valid means: not blank and different from all strings in this list: List(",", "none none", "none, none", "none &na;", "(:null)", "test test test", "test test", "test", "&na; &na;")
• have "Addie Jackson" as author and "Elsevier BV" as publisher (empirically we say they are test records)

2 Map Crossref links to projects/funders¶

Links to funding available in Crossref are mapped as funding relationships (result -- isProducedBy --> project) applying the following mapping:

funder	grant code	Link to
DOI: {10.13039/100010663, 10.13039/100010661, 10.13039/501100007601, 10.13039/501100000780, 10.13039/100010665} or name: 'European Union’s Horizon 2020 research and innovation program'	series of 4-9 digits in award	Link to H2020 project
DOI: {10.13039/100011199, 10.13039/100004431, 10.13039/501100004963, 10.13039/501100000780}	series of 4-9 digits in award	Link to FP7 project
DOI: 10.13039/501100000781 OR name: 'European Union's'	series of 4-9 digits in award	Link to FP7 or H2020 project
DOI: 10.13039/100000001	award	Link to NSF project
DOI: 10.13039/501100001665 OR name: {'The French National Research Agency (ANR)', 'The French National Research Agency'}	award	Link to ANR project
DOI: 10.13039/501100002341	award	Link to Academy of Finland project
DOI: 10.13039/501100001602	award, removing the initial 'SFI' if present	Link to SFI project
DOI: 10.13039/501100000923	award	Link to ARC project
DOI: 10.13039/501100000038	award ignore: we cannot map the project codes in Crossref to project codes in OpenAIRE	Link to NSERC (unidentified project)
DOI: 10.13039/501100000155	award ignore: we cannot map the project codes in Crossref to project codes in OpenAIRE	Link to SSHRC (unidentified project)
DOI: 10.13039/501100000024	award ignore: we cannot map the project codes in Crossref to project codes in OpenAIRE	Link to CIHR (unidentified project)
DOI: 10.13039/501100002848 OR name :'CONICYT, Programa de Formación de Capital Humano Avanzado'	award	Link to CONICYT project
DOI: 10.13039/501100003448	series of 4-9 digits in award	Link to GSRT project
DOI: 10.13039/501100010198	award	Link to SGOV project
DOI: 10.13039/501100004564	series of 4-9 digits in award	Link to MESTD project
DOI: 10.13039/501100003407	award	Link to MIUR project. Since OpenAIRE has a small subset of MIUR projects, a link to the MIUR funder (unidentified project) is also generated
DOI: {10.13039/501100006588, 10.13039/501100004488}	award, removing 'Project No' and 'HRZZ' prefix, if present	Link to HRZZ or MZOS project
DOI: 10.13039/501100006769	award	Link to Russian Science Foundation project
DOI: 10.13039/501100001711	award after '_' and before '/'	Link to SNSF project
DOI: 10.13039/501100004410	award	Link to TUBITAK project
DOI: 10.10.13039/100004440 or name: 'Wellcome Trust Masters Fellowship'	award	Link to Wellcome Trust specific project and to the unidentified project.

3 Intersect Crossref with Unpaywall by DOI (DOIBoost1)¶

The fields we consider from Unpaywall are:

• is_oa
• journal_is_oa
• best_oa_location
• oa_status

The results of Crossref that intersect by DOI with Unpaywall records are enriched with:

OpenAIRE Result field path	Unpaywall field path	Notes
result.instance		created only if best_oa_location is available
result.instance.collectedfrom.name		default value "Unpaywall"
result.instance.collectedfrom.id		default value ""
result.instance.url	best_oa_location
result.instance.license	best_oa_location.license
result.instance.pid	doi
result.instance.accessright		default value Open Access: we do not add instances if Unpaywall says there is no open version
result.instance.accessright.route	oa_status

For the definition of Unpaywall's oa_status refer to the Unpaywall FAQ

4 Intersect DOIBoost1 with ORCID (DOIBoost2)¶

The records are enriched with the ORCID identifiers of their authors.

• if the number of authors from Crossref equals the size of authors from ORCID, then we pick the list of authors with more PIDs and try to enrich it with the PIDs from the other list, based on JaroWrinkler distance on on authors' names, surnames, or fullnames, depending on which properties are available;
• if the number of authors are different, then we take the longest and try to enrich it with the PIDs from the other author list, based on JaroWrinkler distance on on authors' names, surnames, or fullnames, depending on which properties are available

5 Intersect DOIBoost2 with Microsoft Academic Graph (DOIBoost3)¶

The records are enriched with:

• abstracts
• MAG identifiers of authors
• affiliation relationships
• subjects (MAG FieldsOfStudy)
• conference or journal information (in the journal field) TODO: or container, in case of the dump?
• [TO BE REMOVED] instances with URL from MAG

6 Enrich DOIBoost3 with hosting data sources (hostedby) and access right information¶

In this phase we intersect DOIBoost3 with a dataset composed of journals from OpenAIRE, Crossref, and the ISSN gold list. Each journal comes with its International Standard Serial Numbers (issn, eissn, lissn) and, when available, a flag that tells if the journal is open access. The intersection is done on the basis of the International Standard Serial Numbers. The records with a journal.[l|e]issn that match are enriched as follows:

• Each instance gain the hostedby information.
• If the journal is open access, the access rights of the instances are also set to "Open Access" with "gold" route.

The hostedby of records that do not match are set to the "Unknown Repository".